3 years ago

20- (6 x 2) in word problem for the expression

Mathematics

1 answer:

grigory [225]3 years ago

3 0

6 x 2 minus 20 because 6 x 2 is in parenthesis so it comes first

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If sine ⁡theta equals negative 8/17 and the terminal side of theta lies in quadrant IV, find cosine ⁡ theta .

Lelechka [254]

$\sin^2\theta+\cos^2\theta=1\implies \cos\theta=\pm\sqrt{1-\sin^2\theta}$

Since $\sin\theta=-\dfrac8{17}$ , it follows that

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where the sign depends on the location of the terminal side of the angle. Since the terminal side lies in the fourth quadrant, that means the cosine of the angle is positive, so

$\cos\theta=\dfrac{15}{17}$

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Find the lowest common denominator for the following fractions.

Marat540 [252]

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